Effect of dietary phosphorus supplementation on utilization of algae in the grow‐out diet of Nile tilapia Oreochromis niloticus. Issue 9 (27th December 2012)

• Record Type: Journal Article
• Authors: Hussein, Ebtehal El‐Sayed; Dabrowski, Konrad; El‐Saidy, Deyab Mohammed Saad Deyab; Lee, Bong‐Joo
• Is Part Of: Aquaculture research. Volume 45:Issue 9(2014:Aug.)
• Page Start: 1533
• Page End: 1544
• Publication Date: 2012-12-27
• Subjects: Aquaculture -- Periodicals; Fishery management -- Periodicals; 639.8
• DOI: 10.1111/are.12102
• Languages: English
• ISSNs: 1355-557X

Abstract

<abstract abstract-type="main" id="are12102-abs-0001"> <title>Abstract</title> <p>This research involved testing the replacement of corn gluten protein concentrate in the diet of 1.5 g Nile tilapia with biofuel algae‐based or algae supplemented with phosphorus diets. Experimental diets were formulated to replace 50% of the gluten meal protein in the control diet with biofuel algae protein (Alga50) or Spirulina (Spirulina50) protein. In addition, dicalcium phosphate (P) was added to the Alga50 at a concentration of 3.8% or 7.74% to mitigate aluminium (Al) toxicity and designated as Alga50 + P, and Alga50 + PP respectively. After 9 weeks of the feeding experiment, fish fed diets supplemented with P, Alga50 + P and Alga50 + PP differed significantly (<italic>P </italic>&lt;<italic> </italic>0.05) with respect to the feed conversion and protein deposition from the control. The mineral composition of the fish body showed a decrease in levels of Al and iron (Fe) due to the P supplements. The mineral composition of the faeces indicated that Al and Fe were excreted in the faeces and were not accumulated in the fish body. The effect of dicalcium P supplementation on the neutralization of Al in the diet resulted in improved fish growth and histological integrity of the gastrointestinal tract.</p> </abstract>